Pump



FIG. 1 is a front perspective view of a pump having portions shown in phantom;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a bottom plan view thereof.

The elements shown in phantom form no part of the claimed design. 

CLAIM The ornamental design for a pump, as shown and described. 